Key Factors Determining Surface Treatment

The surface treatment process for parts produced by injection molding technology is different from that of mechanical processing or 3D printing technology. The surface finishing of the latter two is carried out after the parts are made, which is a post-processing step; For injection molding technology, the mold itself needs to undergo such treatment (or add texture), and the injected parts are the finished products. For example, if a finished part wants a matte surface, the interior of the mold needs to be textured first to give the injection molded part a matte effect. The key to determining surface treatment is the following two factors:
Improve the appearance of parts
Designers of parts may choose the texture of the finished product for different aesthetic considerations. The smooth or matte texture on the surface of the parts can not only improve the appearance and give a feeling of quality, but also cover up small defects caused during the injection molding process, such as flow lines, weaving lines, dents, or shadow marks. From a business perspective, parts with better surface finish are more attractive to customers.
Improve part functionality
Texture treatment on the surface of parts can improve the adhesion of paint or adhesives. For example, parts with a matte texture are easier to paint and have better durability. The matte texture is also more suitable for sticking labels. Texturing can also make parts easier to grip. By surface treatment of the mold, we can also avoid defects such as over filling or under filling in plastic parts. A well-designed and textured part can also help expel air from the mold to avoid trapping.